防壁

(1)a barrier against explosives

(2)爆発に対する防壁

(3)anything serving to maintain separation by obstructing vision or access

(4)視界や進入を防ぐことによって分離を維持するのに役立つ何か

(5)an embankment built around a space for defensive purposes; "they stormed the ramparts of the city"; "they blew the trumpet and the walls came tumbling down"

(6)防御の目的で空き地の周囲に建てた堤防

(1)